and one of the things romney kept harping on last night was essentially cutting money out of medicare which we all know, in essence, is, in fact, reducing costs. and the only way we're ever going to solve our fiscal problems is reducing our health care costs. that is the key focus. so, you know, i think it's very difficult to articulate that in a sound bite. >> yeah. if you can survive being a health economist, you can survive about anything. austin, appreciate your time. >> that's the business. >> austin ligon, thanks so much. >>> let's go to mary thompson. >> we're looking at nuvasive, trading very active, ten times normal volume for the stock. the reason being the company cut its forecasts for third quarter revenue. now seeing revenue of 147 billion. the reason, the company says delays and more denials from insurance companies. take a look at that stock, off 33%. a number of analysts cutting ratings for nuvasive as well. back to you. >>> straight ahead, the nbc exclusive interview with mark zuckerbe zuckerberg. 1 billion users and their mobile devices. >>> and marriott's stock is h